Thread: Chevy SB Advice please

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Don,

1.6 Rockers will give your cam 6.7% more valve lift and slightly more duration. In effect, it gives you a bigger cam, which should increase both horsepower and torque. If you use them, you need to make sure that they will not cause your valves to hit the piston. I changed the rockers on my Fast Burn 385 to full roller 1.6's (not just roller tips), and the factory says it's no problem. You need to do some checking for your engine, but unless you have a very high compression engine, there's usually no interference.

I used the same trick on my GTO. Changed from 1.5 to 1.65, and it made a noticible difference.

The roller tip will reduce friction quite a bit; however, in my opinion, the HP gain is rather small. The real benefit is in extended valve train life.

Does your engine have self-aligning rockers? If it does, and you change to the Speedway roller-tips, you will need guide plates - at least I'm pretty sure you will. There seems to be nothing on the roller end that will capture the valve stem and keep it aligned. To make sure, call Speedway's tech line and ask them.

Good pushrods are allways a benefit.